or lead? A chemist analyses seawater samples for three heavy metals: iron, lead, and mercury. She finds that 8% of the samples taken from near the mouth of a river on which numerous industrial plants are located contain high levels of all three of these metals, 14% of the samples contain high levels of iron and lead, 10% of the samples contain high levels of iron and mercury, 45% of the samples contain high levels of lead or mercury, 40% of the samples contain high levels of iron, 35% of the samples contain high levels of lead, and 25% of the samples contain high levels of mercury.
1)What is the probability that a randomly chosen sample contains high levels of iron or lead?
2)What is the probability that a randomly chosen sample contains a high level of only mercury?
-usually with these I just draw a picture to figure it out, but this one is pretty complex; if someone can explain how to do it the picture way great, otherwise using formulas would be good too
1)What is the probability that a randomly chosen sample contains high levels of iron or lead?
2)What is the probability that a randomly chosen sample contains a high level of only mercury?
-usually with these I just draw a picture to figure it out, but this one is pretty complex; if someone can explain how to do it the picture way great, otherwise using formulas would be good too